11056543261 has 2 divisors, whose sum is σ = 11056543262. Its totient is φ = 11056543260.

The previous prime is 11056543243. The next prime is 11056543313. The reversal of 11056543261 is 16234565011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11047271236 + 9272025 = 105106^2 + 3045^2 .

It is a cyclic number.

It is not a de Polignac number, because 11056543261 - 2⁷ = 11056543133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11056541261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5528271630 + 5528271631.

It is an arithmetic number, because the mean of its divisors is an integer number (5528271631).

Almost surely, 2^11056543261 is an apocalyptic number.

It is an amenable number.

11056543261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11056543261 is an equidigital number, since it uses as much as digits as its factorization.

11056543261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 11056543261 in words is "eleven billion, fifty-six million, five hundred forty-three thousand, two hundred sixty-one".